Questions to Ask a Welder
Questions for hiring a welder for a specific job: a trailer repair, a handrail, a gate, a cracked bracket, a structural addition. Covers which processes they run, what their certification actually covers, how the work will be priced, and what happens if a weld fails later.
The questions
Open any question for the note
What kind of work do you do most of?
Why ask it
Structural, pipe, sheet metal, ornamental and mobile repair are close to separate trades with different equipment and habits. A shop that does mostly heavy structural work may not be the right hands for thin stainless, and most welders will tell you so if asked plainly.
Which processes do you run yourself: stick, MIG, flux core, TIG?
Why ask it
Process choice follows the material, the thickness and whether the work is indoors or in wind, so a welder who only runs one is limited in what they can quote. Listen for them tying the process to your job rather than listing everything they own.
Have you welded this material before, and what does it need that mild steel does not?
Why ask it
Aluminium, stainless, cast iron and galvanised steel each behave differently and each punish a welder who treats them like mild steel. A good answer names something concrete such as preheat, filler selection, or removing coating before striking an arc.
Are you certified, to which code, and is it current?
Why ask it
A welder certification is tied to a specific process, position, material and thickness range, so certified on its own means very little. Ask what the certification actually covers and whether it matches the joint in front of you.
Does this job need to be inspected or signed off by anyone?
Why ask it
Structural work, anything supporting a load over people, and anything touching a permit may need an inspection or a qualified procedure. A welder who asks what the part does before answering is thinking about the right things.
Is this worth repairing, or should the part be replaced?
Why ask it
This is the question that saves the most money, and an honest tradesperson will sometimes talk you out of the work. A welder who never suggests replacement, particularly on a cracked casting or a rusted through section, is selling hours rather than a fix.
Can you show me a similar job you have done, or a piece I can look at in person?
Why ask it
Photographs of finished beads tell you a lot, and holding a real piece tells you more. Ask what was difficult about the example rather than admiring it, because the answer shows how they think about their own work.
Will you be doing the welding, or will someone else on your crew?
Why ask it
Quotes are often given by the owner and executed by an apprentice, which may be fine for a gate and not for a trailer hitch. Ask who will be on the tools and what their experience is with this specific kind of joint.
Is this a shop job or can you do it on site?
Why ask it
Mobile work needs a generator, wind protection and often a different process, and some repairs simply weld better on a bench. If the part has to come off and travel, that changes the timeline and probably the price.
Do you carry liability insurance and cover for your workers, and can you send me a certificate?
Why ask it
Hot work starts fires and welding injuries are serious, and a certificate emailed without hesitation is a good sign in itself. If someone hedges on this for a job at your property, that answer is the whole answer.
How will you handle fire risk while you are working here?
Why ask it
Sparks travel a surprising distance, fall through gaps and smoulder for hours. Look for specifics: clearing the area, screens or blankets, an extinguisher within reach, and someone watching the area after the work stops.
How will you prepare the joint before welding?
Why ask it
Grinding back to clean metal, removing paint, oil, rust or galvanising, and fitting the parts properly is most of what makes a weld sound. A welder who talks only about welding and not about preparation is describing the easy part of the job.
What do I need to have ready before you arrive?
Why ask it
Access, power, the part dismantled, drawings, a clear working area, someone on site to sign off. Sorting this out in advance is what stops a callout turning into a wasted trip that you pay for anyway.
How do you charge, and is there a minimum or a travel fee?
Why ask it
Hourly, by the job, and by the inch of weld all exist, and small repairs are frequently subject to a callout minimum. Get the minimum and the travel charge before booking, since they can exceed the welding itself on a ten minute repair.
Does the quote include materials, consumables and finishing?
Why ask it
Steel, gas, wire or rods, grinding discs, and any painting or galvanising afterwards add up. Ask whether the number is fixed or an estimate, and what the price is based on if the material market moves.
What could make this cost more than the estimate?
Why ask it
Hidden rust, a crack that runs further than it looks, a part that has been repaired badly before, or metal thinner than expected are the usual causes. A welder who can name the likely surprises has looked at your job properly.
What will the finished weld look like, and will it be dressed or painted?
Why ask it
A structural weld left proud is stronger than one ground flush, so appearance and strength can pull against each other. Say plainly whether this piece is visible, and let them tell you the trade off rather than assuming.
How long will it take, and when could you start?
Why ask it
Ask for both the hours on the tools and the calendar date, because they are rarely related. Small repairs often wait weeks behind a shop's larger contracts, and knowing that lets you decide whether to look elsewhere.
If a weld cracks or fails later, what happens?
Why ask it
You want to know whether there is any warranty, how long it lasts, and whether it covers labour and removal as well as the weld. A vague answer here matters more on a load bearing repair than on a decorative one.
What should I be asking that I have not thought of?
Why ask it
Tradespeople see the same avoidable mistakes repeatedly, and this invites the warning they would not otherwise volunteer. Answers often cover how the part will be used, what the last person did wrong, or a detail of how it should be mounted.
Hiring a Welder for a Specific Job
Practical guidance for the conversation itself
Before You Call
Describe the part and the load, not the weld
Say what the item is, what it holds up, how much it carries, whether people stand on or under it, and where it lives. A welder who knows a bracket carries a swing with a child on it will make different choices than one told only to join two pieces of steel.
Take photographs and a measurement
A picture of the break, a picture of the whole assembly, and the thickness of the metal will get you a usable phone estimate on most small jobs. Without them you will be quoted a range wide enough to be meaningless.
Work out whether it is structural
If failure would drop a load, injure someone, or affect a vehicle on a public road, treat it as structural and ask about certification, inspection and any permit before price. If it is a garden gate, price and turnaround are reasonable things to lead with.
Get two or three quotes on anything substantial
Prices for the same repair vary widely between a mobile operator and a fabrication shop, and the cheapest quote often excludes preparation and finishing. Compare what is included rather than the totals.
Reading the Answers
- A welder who asks what the part does, how it is loaded and what happened to it is diagnosing. One who quotes immediately without seeing photographs is guessing.
- Specific talk about preparation, fit up and cleaning is a better sign than talk about equipment brands.
- Willingness to say a repair is not worth doing, or that a job is outside their experience, is worth more than a broad claim of doing everything.
- Insurance and certification documents that arrive by email the same day tell you how the rest of the job will run.
- Reluctance to put a fixed scope in writing on a job that has a clear scope is a reason to keep looking.
Hot Work at Your Property
- Clear the area yourself of anything flammable within a wide radius, including sawdust, dry grass, fuel containers and cardboard, before they arrive.
- Ask about fumes if the work is indoors, particularly on galvanised, painted or coated metal, and about ventilation while it happens.
- Keep people and pets away from the arc. Looking at a welding arc without a filter damages eyes at a distance, not only up close.
- Check the area again an hour or two after the work stops. Smouldering starts slowly and is the usual cause of a fire after a repair.
- If the welding is near a smoke detector, sprinkler head or gas line, say so before work starts rather than after.
When the Work Is Done
- 1Look at the finished joint before payment, in daylight, and ask about anything that looks porous, undercut or unfilled.
- 2Ask what was actually found once they got into it, since that is often different from the estimate and worth knowing about the part's history.
- 3Ask how to protect the repair: paint, primer, keeping it dry, avoiding load for a period if any applies.
- 4Get the warranty terms, invoice and any inspection paperwork in writing rather than as a verbal assurance.
- 5Keep the photographs and the invoice together if the item is a vehicle, trailer or anything you may sell or insure later.